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(Noun) A small, purple, rat-like creature only found in the fictional world of Pokémon. Since 1999, these rodents have managed to destroy the childhoods of all those who have played the game (Pokémon) and lived on to tell the tale.

Being known to attack when making sudden sharp turns or riding a bicycle in tall grass, one can justify that this is one of the main reasons to why the teens of today are so irritated and, on occasion, extremely flamboyant (see 'scene kids'). It is also a major cause for severe mental disabilities due to the loud, sudden noises this creature brings when it appears.
AH FUCK! I'm out of repels. Alright... move very slowly. Don't make any sudden movements...

*RING RING RING* A WILD RATTATA APPEARS!

FFFFFUUUUUU-
Rattata by Miragemelody August 19, 2009
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Ever met the kind of person who you don't really like at all, but who has the annoying habit of constantly appearing almost everywhere you go? That's a Rattata. The Rattata is the person who you can never seem to get rid of short of taking out a restraining order (and even then they'll find a way around it). They don't seem to get the message that they're not wanted around.

Named after the Pokémon Rattata, which is one of the most common (and annoying) Pokémon encountered in the wild.
Hey Richard, stop being a Rattata and piss off.

That Simon is such a Rattata, I wish he would just leave me alone.
Rattata by Loquacious_T March 27, 2011
Rattata, a usually always Lvl 3 piece of shit pokemon. It is always is the starting areas and they come up out of nowhere to fight you. No-one shows this pokemon respect as it is a weasel rat.
A Rattata appeared!

Gamer : Yeah...no. (Runs Away)
Rattata by Legs You Legend October 29, 2009

top percentage rattata 

1. Youngster Joey's low level (like REALLY low level) Rattata which is defined as, "Top Percentage" until you beat the shit out of it with your Level 5 Cyndaquil
“Remember my super cool Rattata? My Rattata is different from regular Rattata. It’s like my Rattata is the top percentage rattata"
top percentage rattata by Coolcat858 November 26, 2014
An amazing electronic band that we rarely see in the music world.
My girlfriend asked me to put music on while we fuck. Ratatat's wildcat stimulated the hard thrusting my girlfriend received.
Ratatat by bobbyk91 August 16, 2009
When hussain is in the getto he goes ratatata
i'm in the getto, ratatata, ratatata Ahuah
Ratatata by iLikeGun December 19, 2019
“I’m in the ghetto...ratatata....ratatata!” ~ meme by @mukhtarhuh (on tiktok and instagram)
ratatata by rutiee December 29, 2019
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I had a trucker's tan after driving for 10 straight hours on a sunny day.
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British slang for a scientist or technical expert, esp . when the speaker is not certain of the expert’s specific field of study. Not necessarily derogatory, but typically used by persons without a technical background. In the US, the equivalent would be “egghead”, “squint”, or “geek.”

Origin of the word is unknown. Started sometime in World War 2. Given the typical evolution of British slang, could easily have started because what these experts did was confusing or “baffling” to the common person.
According to the boffins downstairs, the murderer used a serrated blade.
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Pee Calculus

When you have to pee in a movie but don’t want to miss anything, and must do the following mental equation: will the amount I have to pee cause enough discomfort to diminish my attention capacity for the remainder of the movie to an extent which is greater than the amount of the movie I would miss by making a mad dash to the restroom.
I saw Satantango last night, wonderful film but by the 5th hour I had to start doing pee calculus.
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